Type Record · As of May 3, 2026
BELL HH-1K
Rotorcraft · HONEYWELL T53-L13B
Registered
1
Year Range
1970–1970
NTSB Events
0
Airworthiness Directives
41
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered BELL HH-1K aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- WA 100.0% 1
By Decade of Manufacture
- 1970s 100.0% 1
02 / NTSB Records
Events involving BELL HH-1K aircraft
No NTSB-recorded events match BELL HH-1K in the indexed corpus.
03 / Airworthiness Directives
FAA directives applicable to BELL HH-1K
41 directive(s) on file. Showing the most recent 25 · 16 more in the Federal Register.
-
Sep 26, 2024
Airworthiness Directives; Bell Textron Inc. and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc. Model 204B, 205A, 205A-1, 205B, 210, and 212 helicopters and various restricted category helicopters with certain part-numbered tension torsion (TT) straps installed by supplemental type certificate (STC) No. SR03408CH. This AD was prompted b…
-
Nov 21, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters and various restricted category helicopters. This AD was prompted by reports of cracks found on the main transmission support case. This AD requires repetitive inspe…
-
Nov 7, 2022
Airworthiness Directives; Bell Textron Inc., Erickson 214 Holdings, LLC, Leonardo S.p.a., and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters; certain Erickson 214 Holdings, LLC, Model 214B and 214B-1 helicopters; certain Leonardo S.p.a. Model AB412 and AB412 EP helicopters; and certain various res…
-
Oct 12, 2022
Airworthiness Directives; Bell Textron Inc. Helicopters and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc. Model 204B, 205A, and 205A-1 helicopters and various restricted category helicopters. This AD was prompted by a report of cracked main rotor blades (MRBs). This AD requires repetitive inspections of each MRB and removing any cracked M…
-
Jun 29, 2022
Airworthiness Directives; Bell Textron Inc. Helicopters and Various Restricted Category Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Inc. Model 204B, 205A, and 205A-1 helicopters and various restricted category helicopters. This proposed AD was prompted by a report of cracked main rotor blades (MRBs). This proposed AD would require repetitive inspections of each M…
-
Apr 14, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters and Various Restricted Category Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters and various restricted category helicopters. This proposed AD was prompted by reports of cracks found on the main transmission support case. This proposed AD w…
-
Mar 16, 2022
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA is adopting a new airworthiness directive (AD) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This AD was prompted by hoists failing lower load limit inspections. This AD requires replacing unmodified hoists, installing placards, revisi…
-
Mar 14, 2022
Airworthiness Directives; Various Restricted Category Helicopters
The FAA is superseding Airworthiness Directive (AD) 2021-15-52 which applied to various restricted category helicopters originally manufactured by Bell Textron Inc. with a certain main rotor hub strap pin (pin) installed. AD 2021-15-52 required removing certain outboard pins from service and prohibited installing them…
-
Sep 30, 2021
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA is revising a notice of proposed rulemaking (NPRM) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This action revises the NPRM by adding a figure and revising certain requirements. The FAA is proposing this airworthiness directive (AD)…
-
Sep 30, 2021
Airworthiness Directives; Arrow Falcon Exporters, Inc. (Previously Utah State University); California Department of Forestry; Firefly Aviation Helicopter Services (Previously Erickson Air-Crane Co.); Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (Previously Western International Aviation, Inc.); International Helicopters, Inc.; Precision Helicopters, LLC; Robinson Air Crane, Inc.; San Joaquin Helicopters (Previously Hawkins and Powers Aviation, Inc.); S.M.&T. Aircraft (Previously US Helicopters, Inc., UNC Helicopter, Inc., Southern Aero Corporation, and Wilco Aviation); Smith Helicopters; Southern Helicopter, Inc.; Southwest Florida Aviation International, Inc. (Previously Jamie R. Hill and Southwest Florida Aviation); Tamarack Helicopters, Inc. (Previously Ranger Helicopter Services, Inc.); US Helicopter, Inc. (Previously UNC Helicopter, Inc.); West Coast Fabrication; and Williams Helicopter Corporation (Previously Scott Paper Co.) Model AH-1G, AH-1S, HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model UH-1B (SW204 and SW204HP) and UH-1H (SW205) Helicopters
The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to supersede Airworthiness Directive (AD) AD 2002-20-01, which applies to certain Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH- 1E, UH-1F, UH-1H, UH-1L, and UH-1P helicopters; and Southwest Florida Aviation Model SW204, SW204HP, SW205, and SW20…
-
Jul 29, 2021
Airworthiness Directives; Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for various restricted category helicopters originally manufactured by Bell Textron Inc. This AD was prompted by a fatal accident in which an outboard main rotor hub strap pin (pin) sheared off during flight, resulting in the main rotor blade and the main rotor he…
-
Jul 26, 2021
Airworthiness Directives; Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for various restricted category helicopters, originally manufactured by Bell Textron Inc. (Bell). This AD was prompted by multiple events involving failure of the tail boom attach structure including the bolts. This AD requires revising the existing Rotorcraft Fli…
-
Dec 11, 2020
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA proposes to adopt a new airworthiness directive (AD) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This proposed AD would require replacing unmodified hoists, installing placards, revising the existing Rotorcraft Flight Manual (RFM) fo…
-
Oct 31, 2019
Airworthiness Directives; Various Experimental and Restricted Category Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for various helicopters operating under experimental airworthiness certificates and various type certificated restricted category helicopters. This proposed AD was prompted by multiple accidents and incidents involving failure of the tail boom attachment str…
-
Feb 19, 2014
Airworthiness Directives; Various Restricted Category Helicopters
We are adopting a new airworthiness directive (AD) for various restricted category helicopters, originally manufactured by Bell Helicopter Textron, Inc. (Bell), model numbers HH-1K, TH-1F, TH-1L, UH- 1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P. This AD requires inspecting the tail rotor (T/R) cable assembly for a…
-
Aug 20, 2013
Airworthiness Directives; Various Restricted Category Helicopters
We propose to adopt a new airworthiness directive (AD) for various restricted category helicopters, originally manufactured by Bell Helicopter Textron, Inc. (Bell), model numbers HH-1K, TH-1F, TH- 1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P. The current type certificate holders include but are not limited…
-
Aug 6, 2013
Airworthiness Directives; Various Restricted Category Helicopters
We are adopting a new airworthiness directive (AD) for Arrow Falcon Exporters, Inc. (previously Utah State University); Firefly Aviation Helicopter Services (previously Erickson Air-Crane Co.); California Department of Forestry; Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (…
-
Jul 9, 2013
Airworthiness Directives; Various Restricted Category Helicopters
We are adopting a new airworthiness directive (AD) for various restricted category Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH- 1F, UH-1H, UH-1L, and UH-1P helicopters with certain main rotor hub inboard strap fittings (fittings) installed. This AD requires a magnetic particle inspection (MPI) of the fittings f…
-
Sep 13, 2012
Airworthiness Directives; Various Restricted Category Helicopters
We are adopting a new airworthiness directive (AD) for various restricted category Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH- 1F, UH-1H, UH-1L, and UH-1P helicopters with certain main rotor (M/R) blade assemblies installed, to require inspecting the grip plates, doublers, and upper and lower surfaces of the M…
-
Jul 30, 2012
Airworthiness Directives; Various Restricted Category Helicopters
We are adopting a new airworthiness directive (AD) for Arrow Falcon Exporters, Inc. (previously Utah State University); Firefly Aviation Helicopter Services (previously Erickson Air-Crane Co.); California Department of Forestry; Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (…
-
Jul 8, 2010
Airworthiness Directives; Arrow Falcon Exporters, Inc. (Previously Utah State University), et al., Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model UH-1B (SW204 and SW204HP) and UH-1H (SW205) Helicopters
This document proposes adopting a new airworthiness directive (AD) for the specified type-certificated military surplus helicopters. The AD would require: Creating a component history card or equivalent record for each main rotor grip (grip); determining and recording the total hours time-in-service (TIS) for each gri…
-
May 13, 2010
Airworthiness Directives; Arrow Falcon Exporters, Inc. (previously Utah State University) et al. Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model UH-1B (SW204 and SW204HP) and UH-1H (SW205) Helicopters
This document proposes adopting a new airworthiness directive (AD) for the specified model helicopters. The AD would require inspecting each affected tail rotor blade (blade) forward tip weight retention block (tip block) and the aft tip closure (tip closure) for adhesive bond voids and removing any blade with an exce…
-
Apr 22, 2010
Airworthiness Directives; Arrow Falcon Exporters, Inc. (previously Utah State University); California Department of Forestry; Firefly Aviation Helicopter Services (previously Erickson Air-Crane Co.); Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (previously Western International Aviation, Inc.); International Helicopters, Inc.; Precision Helicopters, LLC; Robinson Air Crane, Inc.; San Joaquin Helicopters (previously Hawkins and Powers Aviation, Inc.); S.M.&T. Aircraft (previously US Helicopters, Inc., UNC Helicopter, Inc., Southern Aero Corporation, and Wilco Aviation); Smith Helicopters; Southern Helicopter, Inc.; Southwest Florida Aviation International, Inc. (previously Jamie R. Hill and Southwest Florida Aviation); Tamarack Helicopters, Inc. (previously Ranger Helicopter Services, Inc.); US Helicopter, Inc. (previously UNC Helicopter, Inc.); West Coast Fabrication; and Williams Helicopter Corporation (previously Scott Paper Co.) Model AH-1G, AH-1S, HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model UH-1B (SW204 and SW204HP) and UH-1H (SW205) Helicopters
This document proposes superseding an existing airworthiness directive (AD) for Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH- 1F, UH-1H, UH-1L, and UH-1P helicopters; and Southwest Florida Aviation Model SW204, SW204HP, SW205, and SW205A-1 helicopters, manufactured by Bell Helicopter Textron, Inc. (BHTI) for the…
-
Sep 11, 2006
Airworthiness Directives; Arrow Falcon Exporters, Inc. (Previously Utah State University); Firefly Aviation Helicopter Services (Previously Erickson Air-Crane Co.); California Department of Forestry; Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (Previously Western International Aviation, Inc.); International Helicopters, Inc.; Precision Helicopters, LLC; Robinson Air Crane, Inc.; San Joaquin Helicopters (Previously Hawkins and Powers Aviation, Inc.) S.M.&T. Aircraft (Previously U.S. Helicopters, Inc., UNC Helicopter, Inc., Southern Aero Corporation, and Wilco Aviation); Smith Helicopters; Southern Helicopter, Inc.; Southwest Florida Aviation International, Inc. (Previously Jamie R. Hill and Southwest Florida Aviation); Tamarack Helicopters, Inc. (Previously Ranger Helicopter Services, Inc.); U.S. Helicopter, Inc. (Previously UNC Helicopter, Inc.); West Coast Fabrication; and Williams Helicopter Corporation (Previously Scott Paper Co.) Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model SW204, SW204HP, SW205, and SW205A-1 Helicopters
This amendment adopts a new airworthiness directive (AD) for the specified restricted category type-certificated helicopters. The AD requires a review of the helicopter records to determine the Commercial and Government Entity (CAGE) code of the tail rotor (T/R) slider. If the T/R slider is FAA approved or has a certa…
-
Jun 22, 2006
Airworthiness Directives; Arrow Falcon Exporters, Inc. (Previously Utah State University); Firefly Aviation Helicopter Services (Previously Erickson Air-Crane Co.); California Department of Forestry; Garlick Helicopters, Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC (Previously Western International Aviation, Inc.); International Helicopters, Inc.; Precision Helicopters, LLC; Robinson Air Crane, Inc.; San Joaquin Helicopters (Previously Hawkins and Powers Aviation, Inc.); S.M.&T. Aircraft (Previously US Helicopters, Inc., UNC Helicopter, Inc., Southern Aero Corporation, and Wilco Aviation); Smith Helicopters; Southern Helicopter, Inc.; Southwest Florida Aviation International, Inc. (Previously Jamie R. Hill and Southwest Florida Aviation); Tamarack Helicopters, Inc. (Previously Ranger Helicopter Services, Inc.); US Helicopter, Inc. (Previously UNC Helicopter, Inc.); West Coast Fabrication; and Williams Helicopter Corporation (Previously Scott Paper Co.) Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model SW204, SW204HP, SW205, and SW205A-1 Helicopters
This document proposes adopting a new airworthiness directive (AD) for the specified restricted category type-certificated helicopters. The AD would require a review of the helicopter records to determine the Commercial and Government Entity (CAGE) code of the tail rotor (T/R) slider. If the T/R slider is FAA approved…
06 / Supplemental Type Certificates
Modifications approved for BELL HH-1K
16 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
-
02/08/2023
STC SR00119DE
Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables
Midwest Aerospace TC LLC
-
02/08/2023
STC SR09177RC
Modification of the vertical fin spar
Midwest Aerospace TC LLC
-
10/03/2017
STC SR03408CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103
Airwolf Aerospace LLC
-
05/10/2017
STC SR03408CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103
Airwolf Aerospace LLC
-
04/28/2016
STC SR03408CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103
Airwolf Aerospace LLC
-
01/26/2015
STC SR03408CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103
Airwolf Aerospace LLC
-
12/10/2014
STC SR03408CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101 or AA-204-310-103
Airwolf Aerospace LLC
-
11/04/2013
STC SR01742NY
Installation of extended height landing gear.
Dart Aerospace Limited
-
01/26/2012
STC SR00119DE
Installation of an upgraded 42 degree tail rotor gearbox, P/N 212-040-003, and control cables.
Rotorcraft Development Corporation
-
02/04/2009
STC SR09177RC
Modification of the vertical fin spar in accordance with Garlick Master Drawing List GHI 97-07, Revision D dated 2-23-98, or later FAA approved revision is required.
Rotorcraft Development Corporation
-
01/11/2009
STC SR01742NY
Installation of extended height landing gear.
Dart Aerospace Limited
-
01/08/2009
STC SR01298NY
Installation of replacement crosstubes P/N D212-664.
Dart Aerospace Limited
-
08/11/2008
STC SR00563NY
Installation of Skidtubes and associated saddles
Dart Aerospace Limited
-
10/06/1998
STC SR09177RC
Modification of the vertical fin spar.
Garlick Helicopters Inc
-
06/30/1997
STC SR09167RC
Replacement of tail rotor control roller chain.
Garlick Helicopters Inc
-
06/27/1995
STC SR00119DE
Installation of an upgraded 42 degree tail rotor gearbox, P/N 212-040-003, and control cables.
Garlick Helicopters Inc
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for BELL HH-1K
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 1 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N6165X | WA | 1970 | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →